Those would be igneous rocks. Extrusive igneous rocks.
Geological processes form rocks. Igneous rocks are made from magmas. Metamorphic rocks are made by changing the physical environment of a previously existing rock.
Igneous, metamorphic, and existing sedimentary rocks can weather and erode to form sedimentary rocks. Igneous and metamorphic rocks can break down into sediments through processes like weathering and erosion, which then may accumulate and lithify into sedimentary rocks. Existing sedimentary rocks can also be reworked and lithified to form new sedimentary rocks through processes like compaction and cementation.
Rhyolititcen rocks.
earth's interior
Mantle convection
Mantle convection
igneous rocks
The rock cycle.
Geological processes form rocks. Igneous rocks are made from magmas. Metamorphic rocks are made by changing the physical environment of a previously existing rock.
Metamorphic rocks can form from both igneous and sedimentary rocks
Metamorphic rocks can form from both igneous and sedimentary rocks
Igneous, metamorphic, and existing sedimentary rocks can weather and erode to form sedimentary rocks. Igneous and metamorphic rocks can break down into sediments through processes like weathering and erosion, which then may accumulate and lithify into sedimentary rocks. Existing sedimentary rocks can also be reworked and lithified to form new sedimentary rocks through processes like compaction and cementation.
igneous rocks that form on earth's surface
Rhyolititcen rocks.
The two processes in the rock cycle that must occur in order to change any rock into an igneous rock are melting (to form magma) and solidification (to form igneous rock). Melting of existing rocks due to high temperatures or pressure creates molten magma, which can then cool and solidify to form new igneous rocks.
Rock forms through three processes. Sedimentary rocks are formed by the compression of sediment. Igneous rocks are formed when magma crystallizes after melting. Metamorphic rocks are sedimentary and igneous rocks that have been subjected to pressure and heat .